belfast to dublin where buy train or bus?

the

travel problem description:from belfast to dublin is take the bus or the train?where to buy tickets online?trainline dublin have several options, is all written on the gb, isn't that should be in ireland?that a few dublin, no one is inside the central train station, should choose which?or say that is another name of britain?is not the capital of ireland in dublin?

answer:(1)

the scene to buy bus frequencies, the station ticket on the spot.

answer(2):

the train is more comfortable but slightly more expensive, start-stop station is belfast central-dublin connolly, tickets to buy don't have to rush to book.bus is cheap, the same to buy a ticket at the scene.https://bbs.qyer.com/thread-2745263-1.html